US475455A - Maey b - Google Patents

Description

W. H. LAVINIA, Dead. M5 Bi LAvImA, Administratrix.

' SECONDARY VALVE.

(No Model.) 2 Sheets-Sheet 2.

W. H. LA-VINIA, Deod.

M. B. LAV'INIA, Administratrix. SECONDARY VALVE.

N0.475,455. i.) @ha May 24, 1892.

HIIIVMIII ummnunilllllllllilnllill@Il 1 UNITED STATES PATENT OEEIcE.

WILLIAM H. LAVINIA, OF CHICAGO, ILLINOIS; MARY B. LAVINIA ADMINIS- TRATRIX 0F SAID WILLIAM H. LAVINIA, DECEASED.

SECONDARY VALVE.

SPECIFICATION forming part of Letters Patent No. 475,455, dated May 24, 1892.

Application filed November 27, 1889. Serial No. 331,823. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM H. LAVINIA, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvementin Secondary Valves, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure l is a vertical section, the pulley for operating the lever being omitted. Fig. 2 is a section at line 2 2 of Fig. l, looking up. Fig. 3 is a section at line 3 3 of Fig. 1, looking down. Fig. 4 is a section at line 4 et of Fig. l, looking to the left.

In Figs. 2 anda the pulley is shown in elevation.

The drawings may be regarded as about three-fourths of full size; but the size may be varied, as circumstances require.

My improvement is primarily designed to be used in connection with hydraulic elevators, but may be used for other purposes. It is now common to usev a secondary valve to control the movement of a motor which is used to operate a primary valve, which primary valve in hydraulic elevators is used to control the Iiow of water to the opposite ends of the cylinder.

The object of my invention is to provide an improved secondary valve simple in construction and easily operated, which I accomplish as illustrated in the drawings-and, as here-;

inafter described.

That which I claim as new will be pointed out in the claims.

In the drawings, A representsa case, which may be cast, and which contains two valvechambers which communicate with an inletp I5 represents one of the valves. C is the other valve. Each of these valves is provided with a small stem a a', the upper end of which stem is connected with a larger stern b b', which stems pass up through the cap D and are forked at their upper ends. Each of these parts h b is provided with a roller c, one of which is shown in Fig. 1.

E is a lever rigidly secured to a shaft F. The ends of this lever are arranged within the forks of the stems h b', but are not connected therewith.

d d are the valve-seats.

G is an inlet-pipe, through which water can liow under suitable pressure to a chamber or passage H in the case A.

e is an outlet-passage, with which a pipe I is connected, which pipe leads to the motor which controls the primary valve.

f is another outlet, with which a pipe J is connected. The motor is provided with a 6o piston-head, and the pipe I, for the purpose of this description, is supposed to pass to the upper side of such piston-head and the pipe .I passes to the under side of the piston-head of the motor.

K is the discharge-outlet from the case A, with which outlet, as shown, a pipe L is connected. Both of the valve-chambers communicate by means of passages g g with the outlet-passage K. c 7o M are caps over the lower ends of the val vechambers.

N is a pulley upon the shaft, which is designed to receive a cord, by means of which cord and pulley the position of the lever E 75 can be changed at pleasure, so as to control the flow of water to the motor.

O are flanges by means of which the case can be secured to any suitable support.

The operation is as follows: When the 8o valves B C are in their normal position, both will be against their seats, and then water can flow through the passages e fand pipes I J to both sides of the piston-head of the motor, equalizing the pressure thereon, and then the 8 5 motor will remain at rest. Now if one of the valves C, for example, be forced down by the lever E to the position shown in Fig. l water can pass from the passage or chamber H through the port e and pipe I to the upper oo side of the piston-head of the motor; but water cannot iow from the chamber II through the port f and pipeJ to the under side ofsuch piston-head while the lever F. is in the positio n shown in Fig. l, and the force of the water upon the upper side of the piston-head of the motor will force it down and the water beneath the piston-head of the motor will at the same time flow out through the port fand passage g and the discharge-outlet K, the upper Ioo side of the valve C then being relieved from pressure. The primary valve being properly arranged,`th e movement of themotor willcut ott the iow of the water, whichis used "to operate the hydraulic elevator from one end ofthe cylinder and permit its iow to the other end. i When the lever E is released, which may be done before the piston ot themotor reachesnthe I end of its stroke,the pressure of the water on 1 the under side ofthe valve C 'will immediately force it up against its seat, opening the port f to admit water from the chamber H. Then, both ports e f will be open and the water will flow from the chamber H to both sides of the piston-head ofthe motor `and thesame will'remain at rest so long as both otsaid ports e f L. remain open. lf the lever E be held in the; position shown in Fig. l until the piston-head of the" motor reaches the 'end yof its stroke,

then water willcease to'iiow'through the passage e tothe upper side'ofthefpiston-head of the motor, and the ram of the water fin the chamber H, acting on the under side of th'el valve C, will beimmediately felt 'by the "opi erator, who hasjcontrol of the lever, and hel willfthus be notified that the piston-head ot thejmotor "has .reached the end of its stroke If the endhl uflthe leverE be forced down,the valve B will be carried down jbelow the porti e, cutting 0R the v'fiow of water through 'sudh port to the motor, and the port f being thenT open water will How through such fp'rt fand pipe J to theundersidelofthe piston-head ot" the'motorandits movement `vvilloperate `the primary' valve. Vhenever the lever :is rre--` leased from the valve'B,`it willbe atoncere-t turned to its normal ,positionby thepressure of the water in the chamber H, and if not re` leased until the piston of the motorireaches" its lupward `limitthe ram ofthe water on the` valve B will beat Dncefelt by theoperator, as p before stated, `relative tothe valve C., With; my valve nosp ingsare used,"and the eperaftr can know when 'the piston 4ot' the motor has eompletedits stroke,l

I make no cl im for the censtructionlofthe Vmotorand havefreferred lo "the same simply for the purpose ot describing the operation;

- tmy improved secondary valve.

It 'is not essential that the valve bein ther position shown in Fig. l when inuse. "It might be "usedvwith the other end up as well as in othelypositons. Y y Y What'l claim as new,and,de`sire te secure by LettersPatentgisas follows: A l "1. In a secondary valve,the combination,- with a casing having two Valve-chambers, each eommunicating at one end and at "all times withjan 'inlet-chamber H,1a"dischargef outlet K, communicating with the other ends; of said valve-chambers,j'valve-fseats located A"betweentheends `of said valve-chamberaandoutlet-passages eand f, `connniinicfating with 4said valve-chambers x between the's'aid valve- "seats'and the said inlet-chamber'f twor freely and independently movable Eand dis-l connected valves located within v"said valve-i chambers, stems connected with *said "valves"y and extending outside of said casing, and a vibrating lever disconnected from said stems and having a fixed pivot and located practically as described to engage the said stems, substantially as described.

` L2, In secondary valve, the combination,

with acasing having two valve-chambers,

each communicating at one end and at all times with an inlet-chamber H, a dischargeoutlet K, communicating with the other ends of said valve-chambers, valve-seats located between the ends of said valve-chambers, and

outlet-passages 'e'and f, communicating with said valve-chambers between the said valvefseats and the said "inlet-chamber H, of two freely and independently movable and disv connected valves located within said valvechambers, stems conneeted'with said valves and rextending outside of said casing, and a vibratinglever disconnected from said stems `and having ya fixed pivot and located practically as described to intermittently engage 1said stems, substantiallylas described.

3. Aln a secondary valve, the combination, with afcasinghaving two valve-chambers, each communicating at rone end and at all `times with an inlet-chamber H,a `dischargecutlet K, communicating with the other ends of said valve-chambers, valve-seats lcated between the endsof'said valve-chambers, and outlet-passages@ and f, communicating with said valve-chambers between the said valveseatsand the said jinlet-chamber H, of Atwo freely and independently movable `and dis- IOO connected valves located 'within sai'dvalvei chambers, v-st'et'ns `connected with said valves Vand extending outside of I"said casing, and a lever pivoted between itsends upon a xed pivot andhavingits `end-"portions disconnected `from said stems and'located practically as `describedto respeetively engage said stems,

substantially Aas described. l

4. "In asecondary valve, `the combination, with a casing having two valve-chambers, each con'imunicating at `one end and at'all `timesvvithaninlet-chamber H, a dischargevoutlet K, communicating with the other ends of said valve-chambers, valve-seats 'located between the ends of saidvalvechambers, and outletQpassages e and f, vconnniunicating with said valve-chambers between the said valveseats and the :said inlet-chamber I-I, ot two `freely and 'independentlymovable and disconnected valves located within said valvechambers, stems connected with said 'valves and extending outside of said casing'and provided withanttfriction rollers, and a-lever disconnected frem said stem'and having a fixed pivot and located practically as described to engage the said anti-friction rollers of said stems, substantially as described. l l

wIIJLIAM n. L'AvINIii.

Witnesses `Ammer H. ADAMS, nimm T. JONES. y

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